JPH09119279A - Method of propulsive construction of screw auger for excavating gallery - Google Patents

Method of propulsive construction of screw auger for excavating gallery

Info

Publication number
JPH09119279A
JPH09119279A JP27926195A JP27926195A JPH09119279A JP H09119279 A JPH09119279 A JP H09119279A JP 27926195 A JP27926195 A JP 27926195A JP 27926195 A JP27926195 A JP 27926195A JP H09119279 A JPH09119279 A JP H09119279A
Authority
JP
Japan
Prior art keywords
screw auger
fluid
screw
auger
propulsion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27926195A
Other languages
Japanese (ja)
Inventor
Yukinobu Satake
志伸 佐竹
Tadao Hachiman
忠男 八幡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP27926195A priority Critical patent/JPH09119279A/en
Publication of JPH09119279A publication Critical patent/JPH09119279A/en
Pending legal-status Critical Current

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  • Earth Drilling (AREA)

Abstract

PROBLEM TO BE SOLVED: To propel and excavate a gallery simply and properly even in soil having any stratum. SOLUTION: Fluid paths 85 communicated from one end to the other end along the axial direction of a screw auger 8 are formed to the screw auger 8, and the above-mentioned fluid paths 85 are formed so as to be mutually communicated under the state, in which the screw auger 8 is extended. A fluid supply means 9 supplying the fluid paths 85 with a fluid is installed to a screw auger propulsive equipment, and propulsive execution is conducted while ejecting the fluid from the front end section of the screw auger 8 when the screw auger 8 is propelled in soil.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、地中に小,中口径のガ
ス配管等を引き込む際に引込み用の横穴を土中に掘削す
るスクリューオーガーの推進工法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion method of a screw auger for excavating a horizontal hole for drawing into a soil when a small or medium diameter gas pipe or the like is drawn into the ground.

【0002】[0002]

【従来の技術】従来、地中に小,中口径のガス配管等を
引き込むための横穴を掘削する手段としてはスクリュー
オーガー推進工法が知られている。この工法は、配管す
べき地面の一方側に推進用の縦坑と、他方側に到達用の
縦坑とを掘削し、推進用縦坑内にスクリューオーガー推
進機を設置させ、この推進機により所要長さのスクリュ
ーオーガーを順に継ぎ足しながら土中に推進させて到達
用縦坑に至る間に所要口径の横穴を掘削し、この横穴内
に到達用縦坑の側からガス管を引き込み、逆に推進用縦
坑の側にガス管を引き抜いて配管するようにしている。
2. Description of the Related Art Conventionally, a screw auger propulsion method has been known as a means for excavating a lateral hole for introducing a gas pipe having a small or medium diameter into the ground. This construction method excavates a vertical shaft for propulsion on one side of the ground to be piped, and a vertical shaft for reaching on the other side, and installs a screw auger propulsion machine in the vertical shaft for propulsion, which is required by this propulsion machine. A screw auger of a length is added in sequence and propelled into the soil to excavate a horizontal hole with the required diameter while reaching the reaching shaft, and the gas pipe is drawn into the horizontal hole from the reaching shaft to propel it in the opposite direction. A gas pipe is pulled out to the vertical shaft side for piping.

【0003】上述のスクリューオーガー推進装置とし
て、本発明者は、先に特願平5−242244号をもっ
て簡易な構成のオーガー推進装置を提案した。この先に
提案した装置は、図1に示すように、推進用縦坑の穴内
に設置される接地台1に、複数本の水平ガイドシャフト
2と、このガイドシャフト2に支持されて前後に移動す
る移動台3と、移動台3に取付けられた駆動部4と、手
動ハンドル53の操作により駆動部4をガイドシャフト
2に沿って前後方向に移動させるラック51,ピニオン
52等の送り機構5と、駆動部4に装着されて回転力を
伝達する原動機部6とから構成されている。
As the above-mentioned screw auger propulsion device, the present inventor previously proposed an auger propulsion device having a simple structure in Japanese Patent Application No. 5-242244. As shown in FIG. 1, the previously proposed device moves a plurality of horizontal guide shafts 2 on a grounding base 1 installed in a hole of a propulsion shaft and back and forth supported by the guide shafts 2. A moving table 3, a drive unit 4 attached to the moving table 3, a feed mechanism 5 such as a rack 51 and a pinion 52 for moving the drive unit 4 along the guide shaft 2 in the front-rear direction by operating a manual handle 53, It is composed of a prime mover portion 6 mounted on the drive portion 4 and transmitting a rotational force.

【0004】上記駆動部4には、ガイドシャフト2に沿
って移動する前進側の側部に出力軸41を有し、この出
力軸41に備えたチャック機構7を介して所要長さのス
クリューオーガー8を着脱可能に接続させ、駆動部4の
前進行程により先頭のスクリューオーガー8を土中に推
進させた後、推進させたスクリューオーガー8をチャッ
ク機構7より分離して出力軸41から離し、駆動部4を
所要のストローク後退させ、次段のスクリューオーガー
を、分離したスクリューオーガー8の後端部と出力軸4
1のチャック機構7との間に順に継ぎ足して複数個のス
クリューオーガー8を地中に推進させることにより土中
に所要口径の横穴を掘削する構成としている。
The drive unit 4 has an output shaft 41 on the forward side that moves along the guide shaft 2, and a screw auger of a required length is provided via a chuck mechanism 7 provided on the output shaft 41. 8 is detachably connected, the leading screw auger 8 is propelled into the soil according to the forward travel of the driving unit 4, and the propelled screw auger 8 is separated from the chuck mechanism 7 and separated from the output shaft 41 to drive. The part 4 is retracted by a required stroke, and the screw auger of the next stage is separated from the rear end part of the separated screw auger 8 and the output shaft 4.
It is configured to excavate a lateral hole having a required diameter in the soil by sequentially adding the chuck mechanism 7 and the chuck mechanism 7 and propelling a plurality of screw augers 8 into the ground.

【0005】[0005]

【発明が解決しようとする課題】ところで、上述したス
クリュウーオーガー推進装置で推進掘削する土中には様
々な地層があり、例えば硬い粘土質の地層であったり、
乾燥した砂状の地層であったりする。上述のような地層
を上記スクリュウーオーガー推進装置で推進掘削する
際、硬い粘土質を推進掘削する場合には、原動機にかな
り高い負荷がかかり、小型の原動機では推進掘削が不能
であったり、また、無理して施工した際には原動機が破
損してしまう恐れがある。また、乾燥した砂状の地層を
推進掘削した場合には、推進後に崩れてしまい、後に新
設するガス管が引き込めなくなるという問題点が派生す
る。
By the way, there are various geological formations in the soil that is propelled and excavated by the above-mentioned screw auger propulsion device, for example, a hard clayey formation,
It may be a dry sandy stratum. When propulsion excavating the stratum as described above with the screw auger propulsion device, when propulsion excavating hard clay, a considerably high load is applied to the prime mover, and the propulsion excavation is impossible with a small prime mover, or, There is a risk that the prime mover will be damaged if it is forcibly constructed. In addition, when a dry sandy formation is propelled by excavation, it collapses after the propulsion, which causes a problem that a gas pipe to be newly installed cannot be drawn in.

【0006】本発明は、これらの問題を解決すべく提案
されたものであり、どのような地層を有する土中でも、
簡単かつ適正に横穴を推進掘削するスクリューオーガー
の推進工法を提供することを目的とする。
The present invention has been proposed to solve these problems, and in soil having any formation,
It is an object of the present invention to provide a screw auger propulsion method for easily and properly propelling a horizontal hole.

【0007】[0007]

【課題を解決するための手段】上述の目的を達成するた
め、本発明は、土中に開口した縦坑内に推進機本体が設
置され、該推進機本体より横方向に突出する回転出力軸
に所要長さのスクリュウーオーガーを連結し、前記回転
出力軸を横方向に移動してスクリュウーオーガーを土中
に推進させ、所要ストローク推進後に該スクリュウーオ
ーガーの連結を解除して次段のスクリュウーオーガーを
継ぎ足し、該スクリュウーオーガーを順次推進させて横
穴を掘削する横穴掘削用スクリュウーオーガーの推進工
法において、上記スクリュウーオーガーには、その軸方
向に沿って一端から他端に通じる流体通路を有し、スク
リュウーオーガーを継ぎ足した状態では前記流体通路は
互いに連通するように形成し、上記推進装置に、上記流
体通路に流体を供給する流体供給手段を供え、上記スク
リュウーオーガーを土中に推進させる際に、該スクリュ
ウーオーガー先端部より流体を噴出させながら推進施工
するようにしたことを特徴とするものである。
In order to achieve the above-mentioned object, the present invention has a propulsion unit main body installed in a shaft that is opened in the soil, and a rotary output shaft protruding laterally from the propulsion unit main body. Connect the screw auger of the required length, move the rotary output shaft laterally to propel the screw auger into the soil, and after releasing the required stroke, disconnect the screw auger to add the next stage screw auger. In the propulsion method of the horizontal hole excavating screw auger for sequentially promoting the screw auger to excavate a lateral hole, the screw auger has a fluid passage extending from one end to the other end along the axial direction thereof, and the screw auger is provided. The fluid passages are formed so as to communicate with each other when they are replenished, and the propulsion device is supplied with fluid in the fluid passages. Shew fluid supply means, when propelling the screw Wu auger into the soil, it is characterized in that so as to promote construction while jetting a fluid from the screw Wu auger tip.

【0008】また、上記スクリュウーオーガーの先端部
に装着される先端刃に、横穴の外周方向に流体を噴出す
る噴出孔と、推進方向に流体を噴出する噴出孔とを設け
たことを特徴とするものである。
Further, the tip blade mounted on the tip portion of the screw auger is provided with an ejection hole for ejecting fluid in the outer peripheral direction of the lateral hole and an ejection hole for ejecting fluid in the propulsion direction. It is a thing.

【0009】さらに、上記流体供給手段に、流体の流通
・遮断を切り換える切換えバルブを設けたことを特徴と
するものである。
Further, the fluid supply means is provided with a switching valve for switching between circulation and interruption of the fluid.

【0010】[0010]

【作用】このように構成された本発明によると、推進掘
削過程の中で、推進地層が例えば硬い粘土質であった
り,砂状のもの等であったりする場合に、推進機本体に
設けられた流体供給手段のバルブを開放して、スクリュ
ウーオーガーの流体通路に流体を供給し、スクリュウー
オーガー先端部から推進方向及び横穴の外周方向に流体
を噴出させる。これにより硬い粘土質の場合には、推進
方向への流体噴出により土中が軟性化し、また、砂状の
土質の場合には、外周方向への流体噴出により砂状の土
質が締固められる。このように土中を掘削可能条件にし
て、スクリュウーオーガーを推進させて土中に横穴を掘
削する。
According to the present invention having the above-described structure, it is provided in the main body of the propulsion machine when the propulsion formation is, for example, hard clay or sandy during the propulsion and excavation process. The valve of the fluid supply means is opened to supply the fluid to the fluid passage of the screw auger, and the fluid is ejected from the tip of the screw auger in the propulsion direction and the outer peripheral direction of the lateral hole. As a result, in the case of a hard clay, the soil is softened by jetting fluid in the propulsion direction, and in the case of sandy soil, the sandy soil is compacted by jetting fluid in the outer peripheral direction. In this way, excavating a horizontal hole in the soil by propelling the screw auger under the condition that the soil can be excavated.

【0011】[0011]

【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図1はスクリューオーガー推進装置の全体を示
し、この推進装置は、推進用縦坑の穴内に設置される接
地台1に、複数本の横方向へ延びる水平ガイドシャフト
2,2と、このガイドシャフト2,2にスライド可能に
支持されて前後方向へ移動する移動台3と、移動台3に
取付けた駆動部4と、手動ハンドル53の操作により駆
動部4をガイドシャフト2に沿って前後方向へ移動させ
るラック51,ピニオン52からなる送り機構5と、駆
動部4の上部に装着されて回転力を伝達する原動機部6
とから構成されている。
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire screw auger propulsion device. This propulsion device includes a plurality of laterally extending horizontal guide shafts 2 and 2 on a grounding base 1 installed in a hole of a propulsion shaft. A movable table 3 slidably supported by 2, 2 and moving in the front-rear direction, a drive unit 4 attached to the movable table 3, and a manual handle 53 for operating the drive unit 4 in the front-rear direction along the guide shaft 2. A feed mechanism 5 including a rack 51 and a pinion 52 to be moved, and a prime mover unit 6 mounted on an upper portion of the drive unit 4 to transmit a rotational force.
It is composed of

【0012】上記原動機部6としては、配管施工の工事
者が一般的に所有している小型電動ドリルの駆動モータ
を利用しており、原動機部6(以下モータという)は、
駆動部4の上部に備える角穴状の固定枠42に対してこ
れに着脱可能に嵌合させている。この嵌合に際してモー
タ6の出力部に取付けた角軸61を、駆動部4の垂直駆
動軸43の上部に備える備える角穴状の差込み口44に
挿入することでモータ6の回転を駆動部4に伝達するよ
うにしている。
As the above-mentioned prime mover 6, a drive motor of a small electric drill which is generally owned by a construction worker of piping is used, and the prime mover 6 (hereinafter referred to as a motor) is
A rectangular hole-shaped fixed frame 42 provided on the upper portion of the drive unit 4 is detachably fitted to the fixed frame 42. At the time of this fitting, the square shaft 61 attached to the output portion of the motor 6 is inserted into the square hole-shaped insertion hole 44 provided on the upper portion of the vertical drive shaft 43 of the drive portion 4 so that the rotation of the motor 6 is performed. I am trying to reach you.

【0013】上記駆動部4には、ケース内部に図示して
いないが所要の減速機構を構成するウオームギヤ等が内
装されてあり、その出力軸41が、移動台3の縦壁部3
1を貫通して突出され、スクリューオーガー8の後端部
81を着脱可能に取付けるチャック機構7が設けられて
いる。
Although not shown in the figure, the drive unit 4 is internally provided with a worm gear or the like constituting a required speed reduction mechanism, and its output shaft 41 has an output shaft 41 thereof.
There is provided a chuck mechanism 7 which penetrates 1 and which is detachably attached to the rear end portion 81 of the screw auger 8.

【0014】なお前述の接地台1には、その四隅に取付
孔11を有するアンカー固定板12が一体形成されてあ
り、また送り装置5は、手動ハンドル53が正・逆転切
換え可能なラチェット機構を介して駆動ケース54内の
回動軸55と連繋され、手動ハンドル53を矢印A方向
へ回動する場合は回動軸55の先端に取り付けたピニオ
ン52に回転力が伝達されてラック51との噛み合いに
より移動台3および駆動部4が前進方向へ強制的に送ら
れ、矢印B方向には回転がフリーで手動で移動台3およ
び駆動部4を後退方向へ移動可能にしている。
An anchor fixing plate 12 having mounting holes 11 at its four corners is integrally formed on the grounding base 1 described above, and the feeding device 5 has a ratchet mechanism in which a manual handle 53 can be switched between forward and reverse directions. When the manual handle 53 is rotated in the direction of arrow A by being connected to the rotation shaft 55 in the drive case 54 via the rotation shaft 55, the rotation force is transmitted to the pinion 52 attached to the tip of the rotation shaft 55 so that the rotation of the rack 51 and the pinion 52. Due to the meshing, the movable table 3 and the drive unit 4 are forcibly fed in the forward direction, the rotation is free in the arrow B direction, and the movable table 3 and the drive unit 4 can be manually moved in the backward direction.

【0015】図2はスクリュウーオーガーの説明図で、
該スクリュウーオーガー8は、1本単位の長さは略30
〜50cm程度とし、金属製の軸81に、所要ピッチを
有する金属製の螺旋刃82を形成してなるものである。
上記軸81の先端部には雄ネジ部83が形成され、後端
部には該雄ネジ部83と螺合する雌ネジ穴84が形成さ
れてあり、さらに該軸81の中心軸に沿って雄ネジ部8
3の先端から雌ネジ穴84に通じて流体通路85が設け
られている。そして上記雄ネジ部83と雌ネジ穴84と
の螺合により複数本のスクリューオーガー8を直列に継
ぎ足し可能に接続でき、また流体通路85も連通する構
成としている。
FIG. 2 is an explanatory view of the screw auger,
The screw auger 8 has a length of about 30 per unit.
The length is about 50 cm, and the metal shaft 81 is formed with a metal spiral blade 82 having a required pitch.
A male screw portion 83 is formed at the front end portion of the shaft 81, and a female screw hole 84 that is screwed into the male screw portion 83 is formed at the rear end portion thereof, and further along the central axis of the shaft 81. Male screw part 8
A fluid passage 85 is provided from the tip of No. 3 to the female screw hole 84. A plurality of screw augers 8 can be replenished in series by screwing the male screw portion 83 and the female screw hole 84 together, and the fluid passage 85 is also communicated.

【0016】また、先頭のスクリューオーガー8にはそ
の前端に雄ネジ部83を介して先端刃86が取付け可能
となっており、該先端刃86には、横穴の外周方向へ向
けて開口する複数の放射噴出孔86aと、軸方向(推進
方向)に向けて開口する直進噴射孔86bとが設けられ
ており、該放射噴射孔86a及び直進噴射孔86bとは
前記流体通路85に連通している。
Further, a tip blade 86 can be attached to the front end of the head screw auger 8 via a male screw portion 83, and a plurality of tip blades 86 are formed in the outer peripheral direction of the lateral hole. Of the radial ejection port 86a and a straight advancing ejection hole 86b opening in the axial direction (propulsion direction) are provided, and the radial ejection port 86a and the rectilinear ejection hole 86b communicate with the fluid passage 85. .

【0017】上記スクリュウーオーガー推進装置には流
体供給手段9が設けられている。前記チャック機構7及
び該流体供給手段9を図3,図4を用いて説明する。図
に示すように、チャック機構7は、移動台3の縦壁部3
1を貫通して突出する出力軸41に接続されており、前
記出力軸41に嵌着された軸部71と、分割係止駒72
と、スライド筒73とで構成されている。前記軸部71
は後端部につば部71aを有する円筒形状をしており、
その中心部にはスクリューオーガー8の後端部が嵌合す
る略四角形状の挿込口74が形成されている。また、該
挿込口74を囲む周辺部で前記軸部71の先端部には、
円周上に等間隔に4個の分割係止駒72が軸部71の内
外方向へ回動可能に枢支されて配設されており、軸部7
1の外周を軸方向にスライドするスライド筒73によっ
て分割係止駒72がスクリュウーオーガー8を固定した
り解除したりする構成になっている。
A fluid supply means 9 is provided in the screw auger propulsion device. The chuck mechanism 7 and the fluid supply means 9 will be described with reference to FIGS. As shown in the figure, the chuck mechanism 7 includes a vertical wall portion 3 of the movable table 3.
1 is connected to an output shaft 41 projecting through 1 and is fitted to the output shaft 41, and a split locking piece 72.
And a slide cylinder 73. The shaft 71
Has a cylindrical shape with a brim 71a at the rear end,
A substantially square-shaped insertion opening 74 into which the rear end portion of the screw auger 8 is fitted is formed at the center thereof. Further, in the peripheral portion surrounding the insertion port 74, the tip portion of the shaft portion 71 is
Four split locking pieces 72 are arranged at equal intervals on the circumference of the shaft so as to be rotatable inward and outward of the shaft portion 71.
The split locking piece 72 is configured to fix or release the screw auger 8 by a slide cylinder 73 that slides along the outer periphery of the screw 1 in the axial direction.

【0018】また流体供給手段9として、前記縦壁部3
1内部には、該縦壁部31の上端から出力軸41方向に
向けて縦通路91が形成され、さらに、前記出力軸41
の周りに円形の流体溜り92が前記縦通路91に連通し
て形成されている。また、前記出力軸41には、中心軸
から外周方向へ通じて前記流体溜り92へ連通する複数
の放射通路93と、該複数の放射通路93に連通して出
力軸41の中心軸に沿って先端に通じる軸通路94とが
設けられている。さらに、前記出力軸41に嵌着する軸
部71の底面の略中心に、前記軸通路94に連通する連
通孔95が開口されている。さらに、前記縦壁部31の
縦通路91に流体を供給する供給ホース96が連結され
ており、該供給ホースは流体の流通・遮断を切り換える
切換えバルブ97を介して図示しない流体タンクに連結
されている。
As the fluid supply means 9, the vertical wall portion 3
1, a vertical passage 91 is formed from the upper end of the vertical wall portion 31 toward the output shaft 41, and the output shaft 41 is further provided.
A circular fluid reservoir 92 is formed around the above to communicate with the vertical passage 91. Further, the output shaft 41 has a plurality of radial passages 93 that communicate with the fluid reservoir 92 from the central axis in the outer peripheral direction, and a plurality of radial passages that communicate with the plural radial passages 93 along the central axis of the output shaft 41. A shaft passage 94 leading to the tip is provided. Further, a communication hole 95 that communicates with the shaft passage 94 is opened substantially at the center of the bottom surface of the shaft portion 71 fitted to the output shaft 41. Further, a supply hose 96 for supplying a fluid is connected to the vertical passage 91 of the vertical wall portion 31, and the supply hose is connected to a fluid tank (not shown) via a switching valve 97 for switching between circulation and interruption of the fluid. There is.

【0019】次に、前述したように構成されるスクリュ
ウーオーガー推進装置の作用を図3,図5を用いて説明
する。まずスクリュウーオーガー推進装置を推進用の縦
坑内に設置し、手動ハンドル53を操作して移動台3を
後端側へ位置させる。そしてチャック機構7に、先端部
に先端刃86が装着された初段のスクリュウーオーガー
8を取り付け、操作ハンドル53を操作して該スクリュ
ウーオーガー8を土中へ推進させる。そして所要ストロ
ーク推進後に該スクリュウーオーガー8をチャック機構
7より取り外し、次段のスクリュウーオーガー8’を初
段のスクリュウーオーガー8に螺合結合して再びハンド
ル53を操作して推進させる。
Next, the operation of the screw-auger propulsion device constructed as described above will be described with reference to FIGS. First, the screw auger propulsion device is installed in a vertical shaft for propulsion, and the manual handle 53 is operated to position the movable table 3 to the rear end side. Then, the first stage screw auger 8 having the tip blade 86 attached to the chuck mechanism 7 is attached, and the operation handle 53 is operated to propel the screw auger 8 into the soil. After propelling the required stroke, the screw auger 8 is removed from the chuck mechanism 7, and the screw auger 8'of the next stage is screwed to the screw auger 8 of the first stage, and the handle 53 is operated again to propel it.

【0020】上述のように連結したスクリュウーオーガ
ー8を土中に掘削推進させていく過程で、作業者がハン
ドル53の操作に違和感,例えば重くなったり,軽くな
ったりする場合に、推進地層が、例えば硬い粘土質であ
ったり,砂状のもの等であったりすると判断される。こ
のような場合に、推進機本体に設けられた流体供給手段
9の切換えバルブ97を開放して、流体タンクに貯留し
てある流体を推進機本体に供給する。供給された流体
は、供給ホース96を介して縦壁部31内部の縦通路9
1を通過し流体溜り92に送られる。そして出力軸41
の放射通路93をから軸通路94に流通し、軸部71の
連通孔95を通過してスクリュウーオーガー8の流体通
路85に供給される。そして該流体は、先端刃86に設
けられた放射噴射孔86aと直進噴射孔86bとから土
中に噴出される。これにより硬い粘土質の場合には、推
進方向への流体噴出により土中が軟性化し、また、砂状
の土質の場合には、外周方向への流体噴出により砂状の
土質が締固められる。このように土中を掘削可能条件に
して、スクリュウーオーガー8を推進させて土中に横穴
を掘削する。
In the process of excavating and propelling the screw auger 8 connected as described above into the soil, when the operator feels something wrong with the operation of the handle 53, for example, heavier or lighter, the propulsion stratum is For example, it is judged to be hard clay or sandy. In such a case, the switching valve 97 of the fluid supply means 9 provided in the propulsion device main body is opened to supply the fluid stored in the fluid tank to the propulsion device main body. The supplied fluid is supplied to the vertical passage 9 inside the vertical wall portion 31 via the supply hose 96.
1 and is sent to the fluid pool 92. And the output shaft 41
Flowing from the radial passage 93 to the shaft passage 94, passing through the communication hole 95 of the shaft portion 71, and supplied to the fluid passage 85 of the screw auger 8. Then, the fluid is jetted into the soil from the radial jet holes 86a and the straight-ahead jet holes 86b provided in the tip blade 86. As a result, in the case of a hard clay, the soil is softened by jetting fluid in the propelling direction, and in the case of sandy soil, the sandy soil is compacted by jetting fluid in the outer peripheral direction. In this way, excavating a lateral hole in the soil by propelling the screw auger 8 under the condition that the soil can be excavated.

【0021】上述したように本実施例では、流体供給手
段9として縦壁部31及びチャック機構7からスクリュ
ウーオーガー8に流体を供給するように説明したが、本
発明はこれに限らず、他の手段を用いてスクリュウーオ
ーガー8に流体を供給するようにしてもよい。また、流
体としては主に水が利用されるが、例えば土を軟化させ
る薬品を混入したものや、潤滑油の混入した流体でもよ
い。
As described above, in the present embodiment, the fluid is supplied from the vertical wall portion 31 and the chuck mechanism 7 to the screw auger 8 as the fluid supply means 9, but the present invention is not limited to this, and other embodiments are possible. Means may be used to supply fluid to the screw auger 8. Although water is mainly used as the fluid, for example, a fluid mixed with a chemical that softens soil or a fluid mixed with lubricating oil may be used.

【0022】[0022]

【発明の効果】以上説明したように、本発明によると、
連結されるスクリュウーオーガーの先端部より流体を噴
出できる機構にしたため、例えば硬い粘土質等の地層を
掘削推進する場合、流体で土中をある程度軟化できるた
め原動機に無理な負荷をかけることなく掘削推進でき
る。そのため軽量で小型の原動機を使用することができ
るようなる。
As described above, according to the present invention,
Since the mechanism is such that the fluid can be ejected from the tip of the screw auger to be connected, when excavating and propelling a stratum of hard clay, for example, the fluid can soften the soil to some extent, so excavation and propulsion can be performed without applying an excessive load to the prime mover. it can. Therefore, a lightweight and small prime mover can be used.

【0023】また、崩壊しやすい砂状等の地層を掘削す
る場合、流体で土中を締め固めることができるため、後
に引き込む新設管を引き込みしやすくすることができる
ようになる。
Further, when excavating a sandy strata that is likely to collapse, the soil can be compacted with a fluid, so that a new pipe to be pulled in later can be easily pulled in.

【0024】さらに、噴出する流体が潤滑油の効果を有
するため、スクリュウーオーガーと土との摩擦抵抗を軽
減することができ、原動機の負荷を低下させることがで
きるようになる。
Further, since the jetted fluid has the effect of lubricating oil, it is possible to reduce the frictional resistance between the screw auger and the soil and to reduce the load on the prime mover.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明が適用されるスクリューオーガー推進装
置の全体を示す斜視図
FIG. 1 is a perspective view showing an entire screw auger propulsion device to which the present invention is applied.

【図2】スクリュウーオーガーの部分断面説明図FIG. 2 is a partial sectional explanatory view of a screw auger.

【図3】流体供給の経路説明図FIG. 3 is an explanatory view of a fluid supply path.

【図4】流体供給通路の説明図FIG. 4 is an explanatory diagram of a fluid supply passage.

【図5】本発明の作用説明図FIG. 5 is an explanatory view of the operation of the present invention.

【符号の説明】[Explanation of symbols]

1 接地台 11 取付孔 12 アンカー固定板 2 水平ガイドシャフト 3 移動台 31 縦壁部 4 駆動部 41 出力軸 42 固定枠 43 垂直駆動軸 44 差込み口 5 送り機構 51 ラック 52 ピニオン 53 手動ハンドル 54 駆動ケース 55 回転軸 6 原動機部(電動モータ) 61 角軸 7 チャック機構 71 軸部 71a つば部 72 分割係止駒 73 スライド筒 74 挿込口 8 スクリューオーガー 81 軸 82 螺旋刃 83 雄ネジ部 84 雌ネジ部 85 流体通路 86 先端刃 86a 放射噴出孔 86b 直進噴射孔 9 流体供給手段 91 縦通路 92 流体溜り 93 放射通路 94 軸通路 95 連通孔 96 供給ホース 97 切換えバルブ DESCRIPTION OF SYMBOLS 1 Grounding base 11 Mounting hole 12 Anchor fixing plate 2 Horizontal guide shaft 3 Moving base 31 Vertical wall part 4 Drive part 41 Output shaft 42 Fixing frame 43 Vertical drive shaft 44 Insertion port 5 Feed mechanism 51 Rack 52 Pinion 53 Manual handle 54 Drive case 55 rotary shaft 6 prime mover part (electric motor) 61 square shaft 7 chuck mechanism 71 shaft part 71a flange part 72 split locking piece 73 slide cylinder 74 insertion port 8 screw auger 81 shaft 82 spiral blade 83 male screw part 84 female screw part 85 Fluid passage 86 Tip blade 86a Radiation ejection hole 86b Straight advance injection hole 9 Fluid supply means 91 Vertical passage 92 Fluid reservoir 93 Radiation passage 94 Shaft passage 95 Communication hole 96 Supply hose 97 Switching valve

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 土中に開口した縦坑内に推進機本体が設
置され、該推進機本体より横方向に突出する回転出力軸
に所要長さのスクリュウーオーガーを連結し、前記回転
出力軸を横方向に移動してスクリュウーオーガーを土中
に推進させ、所要ストローク推進後に該スクリュウーオ
ーガーの連結を解除して次段のスクリュウーオーガーを
継ぎ足し、該スクリュウーオーガーを順次推進させて横
穴を掘削する横穴掘削用スクリュウーオーガーの推進工
法において、 上記スクリュウーオーガーには、その軸方向に沿って一
端から他端に通じる流体通路を有し、スクリュウーオー
ガーを継ぎ足した状態では前記流体通路は互いに連通す
るように形成し、 上記推進装置に、上記流体通路に流体を供給する流体供
給手段を供え、 上記スクリュウーオーガーを土中に推進させる際に、該
スクリュウーオーガー先端部より流体を噴出させながら
推進施工するようにしたことを特徴とする横穴掘削用ス
クリュウーオーガーの推進工法。
1. A propulsion unit main body is installed in a vertical shaft open in the soil, and a screw output auger of a required length is connected to a rotary output shaft projecting laterally from the propulsion unit main body. Moving in the direction to propel the screw auger into the soil, disconnect the screw auger after advancing the required stroke, add the screw auger of the next stage, and promote the screw auger sequentially to drill a horizontal hole In the screw auger propulsion method, the screw auger has a fluid passage extending from one end to the other end along the axial direction thereof, and the fluid passages are formed to communicate with each other when the screw auger is added, The propulsion device is provided with fluid supply means for supplying fluid to the fluid passage, and the screw auger is provided. A method for propelling a screw auger for excavating a horizontal hole, characterized in that, when propelling rock into the soil, a propelling construction is performed while ejecting a fluid from the tip of the screw auger.
【請求項2】 上記スクリュウーオーガーの先端部に装
着される先端刃に、横穴の外周方向に流体を噴出する噴
出孔と、推進方向に流体を噴出する噴出孔とを設けたこ
とを特徴とする請求項1記載の横穴掘削用スクリュウー
オーガー推進工法。
2. A tip blade attached to a tip portion of the screw auger is provided with an ejection hole for ejecting fluid in an outer peripheral direction of the lateral hole and an ejection hole for ejecting fluid in a propulsion direction. The screw-auger propulsion method for excavating a horizontal hole according to claim 1.
【請求項3】 上記流体供給手段に、流体の流通・遮断
を切り換える切換えバルブを設けたことを特徴とする請
求項1,2記載の横穴掘削用スクリュウーオーガー推進
工法。
3. The screw-auger propulsion method for excavating a horizontal hole according to claim 1, wherein the fluid supply means is provided with a switching valve for switching between circulation and interruption of fluid.
JP27926195A 1995-10-26 1995-10-26 Method of propulsive construction of screw auger for excavating gallery Pending JPH09119279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27926195A JPH09119279A (en) 1995-10-26 1995-10-26 Method of propulsive construction of screw auger for excavating gallery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27926195A JPH09119279A (en) 1995-10-26 1995-10-26 Method of propulsive construction of screw auger for excavating gallery

Publications (1)

Publication Number Publication Date
JPH09119279A true JPH09119279A (en) 1997-05-06

Family

ID=17608706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27926195A Pending JPH09119279A (en) 1995-10-26 1995-10-26 Method of propulsive construction of screw auger for excavating gallery

Country Status (1)

Country Link
JP (1) JPH09119279A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007197996A (en) * 2006-01-26 2007-08-09 Save Machine Co Ltd Underground excavation method having switching joint means and its device
JP2013524049A (en) * 2010-03-31 2013-06-17 トラクト−テヒニーク ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト Method for operating a horizontal drilling device and horizontal drilling device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007197996A (en) * 2006-01-26 2007-08-09 Save Machine Co Ltd Underground excavation method having switching joint means and its device
JP2013524049A (en) * 2010-03-31 2013-06-17 トラクト−テヒニーク ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト Method for operating a horizontal drilling device and horizontal drilling device
US9243453B2 (en) 2010-03-31 2016-01-26 Tracto-Technik Gmbh & Co. Kg Method for operating a horizontal drilling device and horizontal drilling device

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